North Korea responds to UN with nuclear test threat North Korea has threatened to conduct a nuclear test in response to a UN move towards a probe into the country's human rights violations. Its foreign ministry has accused the United States of orchestrating the recent UN resolution calling for the investigation. North Korea previously conducted nuclear tests in 2006, 2009 and 2013. Its threat comes as new satellite images emerge indicating fresh activity at a North Korean nuclear facility. A UN human rights committee on Tuesday passed a resolution calling on the Security Council to refer North Korea to the International Criminal Court for alleged crimes against humanity. BBC